For areas where the film density through the weld varies by more than from the density through the penetrameter, an additional penetrameter shall be used for those areas.
当焊缝区域底片
化超过透计处时，应在该处另加透计。
For areas where the film density through the weld varies by more than from the density through the penetrameter, an additional penetrameter shall be used for those areas.
当焊缝区域底片化超过透计处时，应在该处另加透计。
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